Damper for furnace or stove pipes.



R. HOUSE, JR. DAMPER FOR FURNACE 0R STOVE PIPES.

APPLICATION FILED AUG. 25, 1908.

v Patented Nov. 23, 1909.

time earns PATENT orrrcn RICHARD ROUSE, JR, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO THE BOYNTON FURNACE COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

DAMPER FOR FURNACE OR STOVE PIPES.

Specification of Letters Patent.

Patented Nov. 23, 1909.

Application filed August 25, 1908. Serial No. 450,248.

To all whom it may concern:

Be it known that I, RICHARD Rouse, J r., of Elizabeth, Union county, New Jersey, have invented a new and useful Improvement in Dampers for Furnace or Stove Pipes, of which the following is a full, clear, and exact description.

My invention relates to improvements in dampers for furnace or stove pipes, and more particularly for furnace pipes, and the object of my invention is to produce a simple, easily applied damper which can be conveniently operated at the pipe, to close the pipe more or less as desired, which will cause the products of combustion to pass without permitting any of them to be ejected into the surrounding atmosphere, and which can also be conveniently and nicely operated from a distance, as for instance in an adjoining room or a room above the furnace.

My invention is also intended to provide an apparatus by which the furnace pipe and the front door or damper of the furnace can both be simultaneously but oppositely operated, one being opened when the other is closed.

In some respects my invention is like that disclosed in the patent to Boynton, #27 9,530, dated June 19th, 1883, but I have improved certain details of construction, and have produced a damper which operates more perfectly than the Boynton damper, and which is not likely to be easily broken or disarranged.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar reference characters indicate corresponding parts in all the views.

Figure 1 is a side elevation of a furnace provided with my improved damper, and shows the damper connections. Fig. 2 is a front view of the damper frame and accessories. Fig. 3 is a section on the line 3-3 of Fig. 2, and Fig. 4 is a detail of the damper and its crank shaft.

The damper is hung in a frame 10 usually of rectangular shape, which is applied to the pipe 11 of the furnace 12, and the pipe is of course cut away as shown at 13 to provide for the reception of the frame 10 and of the damper 15 which swings within the pipe, and which closes against an inturned seat 14. on the frame 10. The damper 15 is rigid on its shaft 16, which is substantially like the shaft of the Boynton patent above referred to, and has a crank 17 at one end. But unlike the crank in the Boynton patent, I provide two accessories which while appearing to be details, are important in the successful operation of the damper. First I provide on one side of the crank 17 means as the boss 18 for attaching a weight which will counter-balance the door 32, hereinafter referred to, of the furnace, so that the door and damper can be both easily and simultaneously operated. Second, I provide an offset 19 at the end of the crank which is at right angles to the plane of the damper 15, and by this means the chain or cable for operating the damper gets a better leverage, and so the damper is more easily worked.

Like the Boynton frame, my frame has a raised boss 20 to receive the nut of the bolt 21 by which the clamping plate 22 is secured. The details of this arrangement are, however, different. First, the parts 23 which close over the shaft 16, have a little play so that the bearing can be regulated, and next, the cap 24 which fits over the boss 20 is provided with a slot 25 so that there can be a movement of the clamping plate withrelation to the bolt 21. This bolt, by the way, should be made of brass, as there is sutlicient difference of the co-efiicient of expansion between brass and iron which combined with the slotted arrangement of the boss, prevents the breaking of the clamping plate 22 when it and thenconnected parts become very hot, as they sometimes do when there is a hot fire in the furnace. matter, as provision for expansion has to be made or the parts are quite likely to break in some place or another. The chain 26, or its equivalent, is connected to the off-set 19 of the crank 17, and can be carried off over suitable guide pulleys to any desired point. As shown the chain runs over the pulleys 27 and 28 and up through the floor above to the hook 29, where it can be made fast. Thus by pulling on the chain, the damper 15 can be opened, and by releasing it the damper closes by the weight of the chain, and if necessary an additional weight attached to the part 18.-

Usually the damper -used is operated in connection with the front door 32 of the furnace ash pit, in which case the chain 26 is continued over guide pulleys 30 and 31 This is an important and attached to the said door 32, so that when the chain 26 is pulled to close the damper 15, it opens the door 32, and when slackened, the door closes by its own weight and opens the damper 15. Thus in practice the two parts 15 and 32 can be very nicely regulated so that the fire can be dampened or quickened to a nicety. It will be seen that the damper will turn very freely in its bearings, and these are made practically continuous by having the edge of the frame 10 and a lip 24: on the plate 22, made to engage the middle part of the shaft 16.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent V 1. In draft-controlling apparatus, the combination with a door and a pipe, of a frame set into said pipe, a damper hinged in said frame and adapted to swing inwardly, a crank on said damper, said crank extending in the same plane therewith, then extending outwardly at a substantial angle thereto, and flexible means connecting said damper and said door whereby they may be opened and closed, one being opened when the other is closed, and vice versa.

2. In draft-controlling apparatus, the combination with a door and a pipe, of a frame set into said pipe, a damper hinged in said frame and adapted to swing inwardly, a crank on said damper, and extending in the same plane therewith, then extending out wardly at a substantial angle thereto, means on said crank for receiving a weight adapted to counterbalance the weight of said door, and flexible means connecting said damper and said door whereby they may be opened and closed simultaneously one being opened when the other is closed, and vice versa.

RICHARD HOUSE, JR. Witnesses IVILLIAM RITCHIE, HENRY G. BRUDI, J r. 

